Issues with modem reset

[Piotr Figiel]

Hi Aleksander,
 that's clear but as you can see in the logs the device does respond
to AT commands in the problematic case.
 You can see that there are replies for AT#PORTCFG? on ttyACM0 and yet
for some reason after a while MM decides to use mainly ttyACM3 and
starts to act like ttyACM0 wasn't there.

Best regards, Piotr.

2017-06-28 10:59 GMT+02:00 Aleksander Morgado <aleksander at aleksander.es>:
> On Wed, Jun 28, 2017 at 10:54 AM, Piotr Figiel <figiel at gmail.com> wrote:
>>  thanks for reply.
>>  Yes I could but I think it races with NM which tries to reestablish
>> connection, not sure if such testcase will help to debug this.
>>  I've done some checks with with nmcli d disconnect ttyACM0 and it
>> improved (though I'll redo this more systematically), but the problem
>> may still be in MM and can trigger in case the modem suffers
>> spontaneous restart (or is reconnected on USB).
>
> If the modem restarts and doesn't reply to the AT commands we send to
> the TTY, there's not much we can do... :/
>
> --
> Aleksander
> https://aleksander.es